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Investigation of the crystal and magnetic structures of BaFe12 - x Al x O19 solid solutions (x = 0.1‒1.2)

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Abstract

The structure of barium ferrite BaFe12 - x Al x O19 solid solutions (x = 0.1‒1.2) with iron partially replaced with diamagnetic aluminum ions has been studied by neutron diffraction. Experimental data have been collected at room temperature on a high-resolution diffractometer, which yielded precise information about the changes in the crystal and magnetic structures and data on the behavior of the sample microstructure. Barium hexaferrite retains a magnetoplumbite structure in the entire range of aluminum concentrations under study, and its magnetic structure is described within the Gorter model, with moments orientated along the hexagonal axis. The total magnetic moment per formula unit decreases while diamagnetic aluminum ions substitute for iron ions. Microstrains in crystallites increase with an increase in the diamagnetic ion concentration, which is related to the difference in the ionic radii of iron and aluminum ions.

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Correspondence to V. A. Turchenko.

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Original Russian Text © V.A. Turchenko, A.V. Trukhanov, I.A. Bobrikov, S.V. Trukhanov, A.M. Balagurov, 2015, published in Kristallografiya, 2015, Vol. 60, No. 5, pp. 693–699.

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Turchenko, V.A., Trukhanov, A.V., Bobrikov, I.A. et al. Investigation of the crystal and magnetic structures of BaFe12 - x Al x O19 solid solutions (x = 0.1‒1.2). Crystallogr. Rep. 60, 629–635 (2015). https://doi.org/10.1134/S1063774515030220

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  • DOI: https://doi.org/10.1134/S1063774515030220

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